A METHOD FOR CODING A SEQUENCE OF DIGITAL IMAGES

摘要

The invention refers to a method for coding a sequence of digital images (I) wherein the method uses a number of prediction modes for predicting values of pixels (P1) in the images (I) based on reconstructed values of pixels in image areas processed previously where a prediction error (PE) between predicted values and the original values of pixels (P1) is processed for generating the coded sequence of digital images (CI). The invention is characterized in that a preset prediction mode (NLM) is an intra prediction mode based on pixels of a single image (I) in which preset prediction mode (NLM). In a step i) for a region (R) of pixels with reconstructed values in the single image (I) and for a template (TE) of an image area a first patch (PA1) of pixels in the region (R) which surround a first pixel (P1) to be predicted based on the template (TE) is compared with several second patches (PA2) each second patch (PA2) being assigned to a second pixel (P2) in the region (R) and consisting of pixels in the region (R) which surround the second pixel (P2) based on the template (TE) thereby determining a similarity measure (SM) for each second pixel (P2) describing the similarity between reconstructed values of the pixels of the second patch (PA2) assigned to the respective second pixel (P2) and the reconstructed values of the pixels of the first patch (PA1). In a step ii) a predicted value of each first pixel (PI) is determined based on a weighted sum of values of the second pixels (P2) where the value of each second pixel (P2) is weighted by a weighting factor which is monotonously decreasing in dependency on a decreasing similarity described by the similarity measure (SM) for the respective second pixel (P2).